[AuraTwilight]

Hypnosis, is also used in psychological science.

Hypnosis does not work this way. You are proposing science fiction.

The mystery is there. Well hidden behind the curtains of death and blood. Also all the deaths are explainable by human means, even the latest as a possible culprit could have been the driver of the boat.

The presence of mystery elements is not sufficient to call it a mystery story. You're embarrassing yourself.

There is no proof that the dead, whether man or revived ghost, is not aware of their situation. As the one being looked for he is both allowed to lie as well as not revealing his status.

It has been heavily insinuated with no clues to the contrary. Present clues that the Another is aware of their status. You're not even following Knox rules at this point.